Machine for making shovels



I 1,615,326 4- 1927' J. M. DENNING MACHINE FOR MAKING SHOVELS FiledSept. 15. 1925 2 Sheets-Sheet 1 I N V EN TOR.

A TTORNEYS Jan. 25, 1927. 5,3 6

J. M. DENNING MACHINE FOR MAKING SHOVELS Filed Sept. 15, 1925 2sheets-Sheet 2 sag H 9 9/ INVENTOR. W James [7. 1762172 72y.

ATTORN v Patented Jan. 25, 1927.

PATENT omen JAMES M. DENNING, OF CONNEAUT, OHIO, ASSIGNOB TO THECONNEAUT SHOVEL 001V- PANY, OF CONITEAUT, OHIO, A CORPORATION OF OHIO.

MACHINE FOR MAKING SI-IOVELS.

Application filed September The present improvements relate moreparticularly to mechanism for" spreading the tangs and forming thesocket in plain back shovels. As the manufacture of such shovels is atpresent carried out, a drop hammer or press is employed to form theshovel proper and a hand sledge and mandrel are used to thus spread thetangs and form the socket.

The object of the present invention is to provide an attachment for thedrop hammer or press in which the blade of the shovel is thus formed,whereby the other steps of the operation just described may e auto- 5nratically performed, thereby eliminating all hand work and at the sametime increasing the rate of production.

To the accomplishment of the foregoing and related ends, the invention,then, con- :jsi of the means hereinafter fully described andparticularly pointed out in the claims, the annexed drawings and thefollowing description setting forth in detail certain i'nechanismembodying the invention, such disclosed means constituting, however, but

one of the various mechanical forms in which the principle of theinvention may be used,

In said annexed drawings Fig. 1 is a plan view of a machine cmbodying mypresent improvements; Fig. 2 is a side elevation of such machine;'Fig. 3is an end elevation as viewed fromthe right in Figs. 1 and 2; Fig. l aplan view of the shovel blank upon which the machine is designed tooperate; Fig. 5 is a longitudinal Section of such blank, the plane ofthe section being indicated by the line 55, Fig. 4; Fig. 6 is a planview of the shovel as it comes from the machine; and Figs. 7 and 8 arerespectively a longitudinal section and a transverse section. of suchshove], the planes of such section being indicated by the lines 7-7 and8-8, Fig. 6.

As previously indicated, the mechanism that constitutes the presentimprovement may be added as an attachment to a drop hammer or press ofstandard type, such as has heretofore been employed to form. the flatshovel blank into a blade of desired shape. In the illustratedembodiment of the invention, it has accordingly been consideredunnecessary to show more than the bed 1 and vertical guides 2 of suchdrop hammer. Resting on such bed is the lower 15, 1925. Serial N0.56,484.

die 3, while the upper die l is reciprocably held between said guides 2,suitable mechaiism (not shown) being provided to raise thesame to theproper l ieig'ht and then allow it to drop onto the lower die. Suchdies, it will be noted, are disposed Su' as to open toward the back i.e. the right of the machine, as illustrated in Figs. 1, 2 and 8, inst adof to the front as ordinarily.

Firmly secured, as by means of bolts to such back or right hand side ofbed .1 a supplemental bed or frame 6, it being noted tnat the latter isformed with vertical ribs 7 that enter corresponding grooves 8 cut inbed 1 so that said fran'ie 6 may be adjusted vertically with respect tobed 1 and still be held in proper alignment there with.

Mounted on the upper face of frame 1, so as to be reciprocable towardsand from dies 3 and l, is a slide 10 suitably held in guides 11 andconnected by means of a pitman 12 with a motor driven crank shaft 13,whereby reciprocation of the slide is produced. Qscillatorily attachedto the slide about a transverseaxis, which-is conveniently the same axisas that of the pin 14, whereby pitnian 12 isattached to the slide, is aforwardly projecting plunger or ram 15. The latter rests at anintermediate point on an adjustable spring support 16 whereby itsforward end, i. e., the end that projects towards the dies, may beraised or lowered so as to be centered: more or less exactly with acomplementary recess 17 in the juxtaposed face of the dies. This recess,one-half of which it will be understood is formed in each of the twomeeting faces of the dies, is located to receive the socket portion a ofthe shovel blank A (see Figs. 4 and 5), while the tangs a will projectrearwardly from the dies. The forward end of the plunger is so shapedthat when entered between such tangs and forced into such socket portionof the blank, the tangs will be spread apart and the socket given theproper crosssectional form, as shown in Figs. 6, 7 and 8.

In operation, the fiat blank, as shown in. Figs. L and 5, is placed inproper position on the lower die 3 with the straps or tings extending tothe rear, it being understood that at this stage the plunger 15 iscompletely retracted, such plunger being shown in an intermediateposition in its path of travel in the several figures of the drawings.

Ill

Thereupon the hammer is caused to drop, bringing the upper die 4 intoforceful contact with the blank on the lower die, and as soon as suchupper die has thus seated, the mechanism for reciprocating the slide 10is set in motion through a suitable trip lever 20, as need not beexplained in detail. The plunger 15 is thus advanced towards the drophammer, going in just far enough to spread the tangs and form thesocket, following which it is returned to its normal position. Thehammer is now opened by raising die 4 and the shovel blade properlyshaped and with its socket properly opened and formed is removed and afresh blank substituted therefor.

From the foregoing, it will be seen that my improved mechanism may bereadily applied as an attachment to existing drop hammers such as are atpresent used in the manufacture of shovel blades. The dies of the drophammer remain just as accessible as before for insertion of the shovelblank and removal of the finished blade, and the operation of spreadingthe tangs and forming the socket is quickly and easily carried outwithout requiring the operator to change his position. Furthermore, itis possible to make all of the sockets of exactly the same depth sincethe stroke of the plunger 15 may be accurately gauged and theuncertainty ot' the old hand operation is thus entirely eliminated.

Other modes of applying the principle of my invention may be employedinstead of the one explained, change being made as regards the mechanismherein disclosed, provided the means stated by any or" the followingclaims or the equivalent of such stated means be employed.

1 therefore particularly point out and distinctly claim as myinvention 1. In a shovel making machine, the combination with astationary lower die and vertically reciprocable upper die adapted toform a flat blank into a blade of desired shape; of a plungerreciprocable transversely of said dies, said plunger being adapted toenter between the tangs of such blank to spread the same and form thesocket; and

a spring supporting said plunger and serving as a guide therefor.

2. In a shovel making machine, the combination with a drop hammerequipped with a stationary lower die and vertically reciprocable upperdie adapted to form a flat shovel blank into a blade of desired shape; asupplemental bed attached to the rear side of said drop hammer; a slideon said bed reciprocable transversely of said dies; and a plungerpivoted at one end to said slide and having its other end formed toenter between the tangs of such blank to spread the same and form thesocket.

3. In a shovel making machine, the combination with a drop hammerequipped with a stationary lower die and vertically reciprocable upperdie adapted to form a iat shovel blank into a blade of desired shape; asupplemental bed attached to the rear side of said drop hammer; a slideon said bed reciprocable transversely of said (lies' a plunger pivotedabout a horizontal axis at one end to said slide and having its otherend formed to enter between the tangs of such blank to spread the sameand form the socket; and an adjustable support serving as a guide forsaid plunger.

4. In a shovel making machine, the combination with a drop hammerequipped with a stationary lower die and vertically reciprocable upperdie adapted to form a flat shovel blank into a blade of desired shape; asupplemental bed vertically adjustably attached to the rear side of saiddrop hammer; a slide on said bed reciprocable transversely of said dies;and a plunger carried by said slide and adapted to enter between thetangs of such blank to spread the same and form the socket.

Signed by me this 12th day of September, 1925.

JAMES M. DENNING.

